private bool IsCastleMove(King king, Square startingSquare, Square endingSquare, out CastleType?type)
{
type = null;
if (startingSquare.Coordinate != king.GetCastleStartingPosition())
{
return(false);
}
if (endingSquare.Coordinate == king.GetCastleEndingPosition(CastleType.KingSide))
{
type = CastleType.KingSide;
return(true);
}
else if (endingSquare.Coordinate == king.GetCastleEndingPosition(CastleType.QueenSide))
{
type = CastleType.QueenSide;
return(true);
}
return(false);
}
public Castle(King king, Rook rook, Board board, CastleType type)
: base(true,
king,
null,
board[king.GetCastleStartingPosition()],
board[king.GetCastleEndingPosition(type)],
null)
{
_type = type;
_board = board;
_rook = rook;
_rookStartingPosition = board[King.GetCastleRookStartingSquare(type)];
_rookEndingPosition = board[King.GetCastleRookEndingPosition(type)];
}
internal static IEnumerable <SquareCoordinate> GetKingMobility(King king, SquareCoordinate startingCoordinate, Board board)
{
var ret = new List <SquareCoordinate>();
SquareCoordinate?newPos = null;
//Upper left
if (TryGetNewPosition(startingCoordinate.Rank + 1, startingCoordinate.File - 1, out newPos))
{
if (!board.IsControlledByColor(newPos.Value, king.Color.OpponentColor) &&
board.CanPieceOfColorGoToSquare(newPos.Value, king.Color))
{
ret.Add(newPos.Value);
}
}
//Upper middle
if (TryGetNewPosition(startingCoordinate.Rank + 1, startingCoordinate.File, out newPos))
{
if (!board.IsControlledByColor(newPos.Value, king.Color.OpponentColor) &&
board.CanPieceOfColorGoToSquare(newPos.Value, king.Color))
{
ret.Add(newPos.Value);
}
}
//Upper right
if (TryGetNewPosition(startingCoordinate.Rank + 1, startingCoordinate.File + 1, out newPos))
{
if (!board.IsControlledByColor(newPos.Value, king.Color.OpponentColor) &&
board.CanPieceOfColorGoToSquare(newPos.Value, king.Color))
{
ret.Add(newPos.Value);
}
}
//Middle right
if (TryGetNewPosition(startingCoordinate.Rank, startingCoordinate.File + 1, out newPos))
{
if (!board.IsControlledByColor(newPos.Value, king.Color.OpponentColor) &&
board.CanPieceOfColorGoToSquare(newPos.Value, king.Color))
{
ret.Add(newPos.Value);
}
}
//Middle left
if (TryGetNewPosition(startingCoordinate.Rank, startingCoordinate.File - 1, out newPos))
{
if (!board.IsControlledByColor(newPos.Value, king.Color.OpponentColor) &&
board.CanPieceOfColorGoToSquare(newPos.Value, king.Color))
{
ret.Add(newPos.Value);
}
}
//Bottom right
if (TryGetNewPosition(startingCoordinate.Rank - 1, startingCoordinate.File + 1, out newPos))
{
if (!board.IsControlledByColor(newPos.Value, king.Color.OpponentColor) &&
board.CanPieceOfColorGoToSquare(newPos.Value, king.Color))
{
ret.Add(newPos.Value);
}
}
//Bottom middle
if (TryGetNewPosition(startingCoordinate.Rank - 1, startingCoordinate.File, out newPos))
{
if (!board.IsControlledByColor(newPos.Value, king.Color.OpponentColor) &&
board.CanPieceOfColorGoToSquare(newPos.Value, king.Color))
{
ret.Add(newPos.Value);
}
}
//Bottom left
if (TryGetNewPosition(startingCoordinate.Rank - 1, startingCoordinate.File - 1, out newPos))
{
if (!board.IsControlledByColor(newPos.Value, king.Color.OpponentColor) &&
board.CanPieceOfColorGoToSquare(newPos.Value, king.Color))
{
ret.Add(newPos.Value);
}
}
//King side castle
if (CanCastle(king, board, CastleType.KingSide))
{
ret.Add(king.GetCastleEndingPosition(CastleType.KingSide));
}
//Queen side castle
if (CanCastle(king, board, CastleType.QueenSide))
{
ret.Add(king.GetCastleEndingPosition(CastleType.QueenSide));
}
return(ret);
}
